What is 6421 in scientific notation

1 answer:

4 0

The scientific notation should specific the significant digits. So it to write like x.xx * 10 ^ x. So the answer is 6.421 * 10 ^3.

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Which of the following processes would you predict to have an increase in entropy?

Anna [14]

C. Melting ice.
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Condensation of water occurs from a gas to a liquid state, which takes energy out of the system(water) and gives it to the surroundings(air around it). Freezing water is the same as condensation except for the state change. Deposition is simply gas to a solid instantaneously so you can again see it as with the other two examples.

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In a hypothetical atom, electron N transitions between energy levels, giving off orange light in the transition. In the same ato

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Answer : Electron P has greater energy difference than the Electron N.

Explanation :

Wavelength range of violet light = 400 - 500 nm

Wavelength range of orange light = 600 - 700 nm

The Planck's equation is,

$E=\frac{h\times c}{\lambda}$

where,

E = energy of light

c = speed of light

$\lambda$ = wavelength of light

According to the Planck's equation, wavelength and energy follow inverse relation. As the wavelength increases, energy decreases.

From the given spectrum, the wavelength of violet light is less. We conclude that When electron P gives violet light on transition it means that energy difference between the energy level was high.

From the given spectrum, the wavelength of orange light is more. We conclude that When electron N gives orange light on transition it means that energy difference between the energy level was low.

So, Electron P which gives violet light on transition has greater energy difference than the Electron N.

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3 years ago

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The what and what properties of a substance affect how substances in a mixture seperate

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Psychical(you see the changes visible) and Chemical properties(they react and combine, you may see fizzing or bubbles).

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Which orbital notation represents a noble gas in the ground state

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In order to represent a noble gas the Orbital notation should be equal to 2, 8 or 18 for eg. 1s²

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A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200°C and is permitted to achieve a steady-state diffus

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Answer:

1.2 × 10−7 kg/m2·s

Explanation:

Please mark me as brainiest

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